Question

fie multimea A={11,13,21,31,49,55} B={13,31,48,55} C={11,13,21,48}

Answer 1

a) AUB={11,13,21,31,48,49,55};

A intersectat B={13,31,55};

AUC={11,13,21,31,48,49,55};

A intersectat C={11,13,21};

AU(B intersectat C)={11,13,21,31,48,49,55}